Team promoted from Division Two
| Team | Primary home ground | Other grounds | Coach | Captain | Overseas player(s) |
| Durham | Riverside Ground, Chester-le-Street | — | Jon Lewis | Paul Collingwood | John Hastings |
| Hampshire | The Rose Bowl, Southampton | — | Dale Benkenstein | Jimmy Adams (Apr-Jul) James Vince (Jul-Sep) | Jackson Bird (Apr-Aug) Ryan McLaren (Aug-Sep) |
| Middlesex | Lord's, London | Merchant Taylors' School Ground, NorthwoodUxbridge Cricket Club Ground, Uxbridge | Richard Scott | Adam Voges (Apr–May) James Franklin (May–Sep) | Adam Voges (Apr–May) Joe Burns (May–Jul) |
| Nottinghamshire | Trent Bridge, Nottingham | — | Mick Newell | Chris Read | Vernon Philander (Apr–May) Ben Hilfenhaus (Jun–Sep) |
| Somerset | County Ground, Taunton | — | Matthew Maynard | Marcus Trescothick | Abdur Rehman |
| Sussex | County Ground, Hove | Arundel Castle Cricket Club Ground, ArundelCricket Field Road Ground, Horsham | Mark Robinson | Ed Joyce | Steve Magoffin |
| Warwickshire | Edgbaston, Birmingham | — | Dougie Brown | Varun Chopra | Jeetan Patel |
| Worcestershire | County Ground, New Road, Worcester | — | Steve Rhodes | Daryl Mitchell | Sachithra Senanayake (Apr–May) Colin Munro (May–Jun) Saeed Ajmal |
| Yorkshire | Headingley, Leeds | North Marine Road Ground, Scarborough | Jason Gillespie | Andrew Gale | Cheteshwar Pujara (Apr–May) Glenn Maxwell (May–Jun) Aaron Finch (Jun–Sep) |
| Durham | Hampshire | Middlesex | Nottinghamshire | Somerset | Sussex | Warwickshire | Worcestershire | Yorkshire |
| Durham | Hampshire7 wickets | Middlesex71 runs | Durham6 wickets | Durham120 runs | Durham6 wickets | Warwickshire2 wickets | Durham3 wickets | Yorkshireinns & 47 runs |
| Hampshire | Match drawn | Match drawn | Match drawn | Somerset9 wickets | Sussex92 runs | Hampshire216 runs | Match drawn | Yorkshire5 wickets |
| Middlesex | Middlesex187 runs | Middlesex9 wickets | Match drawn | Match drawn | Middlesex20 runs | Match drawn | Match drawn | Middlesex246 runs |
| Nottinghamshire | Nottinghamshire52 runs | Hampshire8 wickets | Match drawn | Somerset133 runs | Nottinghamshire159 runs | Nottinghamshireinns & 123 runs | Nottinghamshire113 runs | Match drawn |
| Somerset | Durham7 wickets | Match drawn | Middlesex5 wickets | Somerset2 wickets | Match drawn | Somerset17 runs | Match drawn | Match drawn |
| Sussex | Durham178 runs | Hampshire6 wickets | Middlesex79 runs | Nottinghamshireinns & 103 runs | Match drawn | Sussex1 wicket | Sussex61 runs | Match drawn |
| Warwickshire | Warwickshire8 wickets | Match drawn | Match drawn | Match drawn | Warwickshire7 wickets | Match drawn | Warwickshire181 runs | Yorkshire174 runs |
| Worcestershire | Durham6 wickets | Worcestershireinns & 33 runs | Worcestershireinns & 128 runs | Nottinghamshire5 wickets | Worcestershireinns & 62 runs | Sussexinns & 63 runs | Warwickshireinns & 17 runs | Yorkshire10 wickets |
| Yorkshire | Yorkshire183 runs | Yorkshire305 runs | Yorkshire4 wickets | Yorkshireinns & 8 runs | Yorkshireinns & 126 runs | Yorkshire100 runs | Match drawn | Yorkshire7 wickets |
| Home team won | Visiting team won | Match drawn |
| 12–15 April | Sussex | v | (H) Hampshire | Sussex won by 92 runs |
| Scorecard | 444 (142.4 overs)BC Brown 144* (242)DR Briggs 4/74 (32.4 overs) | 231 (50 overs)SM Ervine 66* (89)A Shahzad 3/54 (12 overs) | The Rose Bowl, SouthamptonUmpires: Russell Evans and Alex Wharf | |
| 164 (53 overs)LJ Wright 61 (87)JA Tomlinson 4/37 (12 overs) | 285 (65.3 overs)MA Carberry 79 (86)A Shahzad 3/63 (16 overs) | |||
| Sussex won the toss and elected to bat , Points: Sussex 22, Hampshire 3 |
| 12–15 April | Nottinghamshire | v | (H) Middlesex | Match drawn |
| Scorecard | 298 (93.2 overs)BRM Taylor 106 (188)JAR Harris 4/75 (23 overs) | 181 (66 overs)JA Simpson 35 (80)SR Patel 3/30 (6 overs) | Lord's, LondonUmpires: Nick Cook and Michael Gough | |
| 401/8d (96 overs)CMW Read 101* (77)TJ Murtagh 3/69 (24 overs) | 300/7 (118.5 overs)NRD Compton 85 (217)HF Gurney 3/69 (24 overs) | |||
| Nottinghamshire won the toss and elected to bat , Points: Nottinghamshire 10, Middlesex 8 |
| 12–14 April | (H) Somerset | v | Durham | Durham won by 7 wickets |
| Scorecard | 299 (75 overs)JG Myburgh 118 (160)PD Collingwood 5/57 (12 overs) | 380 (92.5 overs)PD Collingwood 109* (145)L Gregory 5/99 (21 overs) | County Ground, TauntonUmpires: Mark Benson and Nigel Cowley | |
| 230 (59.4 overs)PD Trego 79 (83)C Rushworth 6/92 (22 overs) | 150/3 (32.3 overs)SG Borthwick 51* (60)J Overton 1/27 (6 overs) | |||
| Somerset won the toss and elected to bat , Points: Durham 23, Somerset 5 |
| 12–14 April | (H) Worcestershire | v | Yorkshire | Yorkshire won by 10 wickets |
| Scorecard | 311 (93.3 overs)TC Fell 114 (196)JA Brooks 5/56 (21.3 overs) | 307 (85.1 overs)AZ Lees 87 (135)GM Andrew 5/85 (21.1 overs) | County Ground, New Road, WorcesterUmpires: Jeff Evans and Jeremy Lloyds | |
| 100 (35.3 overs)T Kohler-Cadmore 24 (59)SA Patterson 5/11 (7.3 overs) | 105/0 (17 overs)AZ Lees 52* (51) | |||
| Worcestershire won the toss and elected to bat , Points: Yorkshire 22, Worcestershire 6 |
| 19–22 April | (H) Nottinghamshire | v | Yorkshire | Match drawn |
| Scorecard | 428 (108.2 overs)AD Hales 236 (282)SA Patterson 3/78 (29 overs) | 441 (147.5 overs)JA Leaning 116 (198)SR Patel 4/102 (32.5 overs) | Trent Bridge, NottinghamUmpires: Rob Bailey and Russell Evans | |
| 354/7d (105 overs)CMW Read 83* (107)WMH Rhodes 2/42 (15 overs) | ||||
| Yorkshire won the toss and elected to field , First-class debut: Matthew Fisher (Yorkshire) , Points: Nottinghamshire 11, Yorkshire 11 |
| 19–22 April | (H) Sussex | v | Worcestershire | Sussex won by 61 runs |
| Scorecard | 345 (79 overs)MW Machan 135 (100)GM Andrew 3/73 (17 overs) | 389 (105.1 overs)RK Oliver 101 (212)SJ Magoffin 3/69 (26 overs) | County Ground, HoveUmpires: Neil Bainton and Steve O'Shaughnessy | |
| 290 (87 overs)EC Joyce 82 (149)SMSM Senanayake 4/50 (27 overs) | 185 (59.3 overs)OB Cox 48* (74)A Shahzad 5/46 (16 overs) | |||
| Sussex won the toss and elected to bat , Points: Sussex 22, Worcestershire 7 |
| 19–22 April | Hampshire | v | (H) Warwickshire | Match drawn |
| Scorecard | 319 (89.3 overs)AJA Wheater 74 (91)WB Rankin 6/75 (16.3 overs) | 280 (85.3 overs)TR Ambrose 113 (159)JA Tomlinson 3/53 (17 overs) | Edgbaston, BirminghamUmpires: Graham Lloyd and Tim Robinson | |
| 339 (94.2 overs)SM Ervine 102 (144)R Clarke 3/63 (16 overs) | 244/5 (105.4 overs)V Chopra 119* (309)JA Tomlinson 2/56 (21 overs) | |||
| Warwickshire won the toss and elected to field , Points: Hampshire 11, Warwickshire 10 |
| 26–29 April | Sussex | v | (H) Durham | Durham won by 6 wickets |
| Scorecard | 335 (72.2 overs)OE Robinson 110 (112)U Arshad 3/41 (10.2 overs) | 339 (82.2 overs)JW Hastings 72 (86)OE Robinson 4/71 (17 overs) | Riverside Ground, Chester-le-StreetUmpires: Peter Hartley and Graham Lloyd | |
| 265 (69.4 overs)MW Machan 80 (122)C Rushworth 5/81 (23 overs) | 263/4 (69.2 overs)SG Borthwick 97* (143)A Shahzad 4/86 (22 overs) | |||
| Durham won the toss and elected to field , First-class debut: Ollie Robinson (Sussex) , Points: Durham 22, Sussex 6 |
| 26–29 April | Nottinghamshire | v | (H) Hampshire | Match drawn |
| Scorecard | 371 (120.4 overs)AD Hales 141 (221)GK Berg 3/88 (27 overs) | 276 (95.1 overs)JHK Adams 61 (149)L Wood 3/68 (22 overs) | The Rose Bowl, SouthamptonUmpires: Nigel Cowley and Steve O'Shaughnessy | |
| 296/4d (59 overs)BRM Taylor 103 (120)LA Dawson 2/67 (12 overs) | 29/0 (9.4 overs)LA Dawson 19* (37) | |||
| Hampshire won the toss and elected to field , Points: Nottinghamshire 6, Hampshire 5 |
| 26–29 April | (H) Somerset | v | Middlesex | Middlesex won by 5 wickets |
| Scorecard | 408 (89.2 overs)JC Hildreth 187 (212)JAR Harris 5/83 (18 overs) | 317 (87 overs)AC Voges 98 (135)L Gregory 6/101 (23 overs) | County Ground, TauntonUmpires: Richard Kettleborough and Alex Wharf | |
| 310 (80.3 overs)JC Hildreth 86 (153)JAR Harris 3/64 (18 overs) | 405/5 (101.5 overs)AC Voges 132 (210)L Gregory 2/100 (27 overs) | |||
| Middlesex won the toss and elected to field , Points: Middlesex 22, Somerset 8 |
| 26–29 April | Warwickshire | v | (H) Yorkshire | Match drawn |
| Scorecard | 435 (143.3 overs)IJ Westwood 196 (377)TT Bresnan 5/85 (30 overs) | 303 (98.3 overs)AW Gale 96 (182)WB Rankin 6/55 (15.3 overs) | Headingley, LeedsUmpires: Steve Garratt and Jeremy Lloyds | |
| 219/7d (54.3 overs)IJ Westwood 84 (134)JD Middlebrook 5/82 (16.3 overs) | 221/4 (64 overs)AJ Hodd 54* (93)JS Patel 3/70 (28 overs) | |||
| Warwickshire won the toss and elected to bat , Points: Warwickshire 11, Yorkshire 9 |
| 2–5 May | (H) Middlesex | v | Durham | Middlesex won by 187 runs |
| Scorecard | 463 (137 overs)SD Robson 178 (300)JW Hastings 4/87 (33 overs) | 294 (92.5 overs)KK Jennings 98 (214)James Harris 4/69 (22.3 overs) | Lord's, LondonUmpires: Neil Bainton and Peter Hartley | |
| 89 (24.2 overs)TJ Murtagh 22* (14)JW Hastings 5/24 (8.2 overs) | 71 (24.1 overs)SG Borthwick 14 (26)James Harris 9/34 (12.1 overs) | |||
| Durham won the toss and elected to field , Points: Middlesex 23, Durham 4 |
| 3–5 May | Somerset | v | (H) Worcestershire | Worcestershire won by an innings and 62 runs |
| Scorecard | 250 (75.1 overs)C Overton 41 (56)CAJ Morris 5/71 (24 overs) | 402 (111.5 overs)OB Cox 109 (162)AC Thomas 4/81 (23 overs) | County Ground, New Road, WorcesterUmpires: Russell Evans and Michael Gough | |
| 90 (32 overs)JC Hildreth 35 (73)JD Shantry 4/15 (8 overs) | ||||
| Worcestershire won the toss and elected to field , Points: Worcestershire 23, Somerset 5 |
| 9–12 May | (H) Warwickshire | v | Worcestershire | Warwickshire won by 181 runs |
| Scorecard | 264 (101.3 overs)SR Hain 82 (166)J Leach 6/73 (26.3 overs) | 149 (42.5 overs)OB Cox 45 (72)KHD Barker 3/43 (15 overs) | Edgbaston, BirminghamUmpires: David Millns and Martin Saggers | |
| 321/8d (109 overs)V Chopra 107 (229)J Leach 2/61 (24 overs) | 255 (83 overs)OB Cox 44 (47)JS Patel 4/69 (22 overs) | |||
| Worcestershire won the toss and elected to field , Points: Warwickshire 21, Worcestershire 3 |
| 10–12 May | Nottinghamshire | v | (H) Durham | Durham won by 6 wickets |
| Scorecard | 245 (75.1 overs)MH Wessels 117 (168)C Rushworth 3/52 (18 overs) | 163 (48.4 overs)MD Stoneman 44 (51)VD Philander 3/27 (13 overs) | Riverside Ground, Chester-le-StreetUmpires: Russell Evans and Neil Mallender | |
| 178 (54.1 overs)JWA Taylor 45 (70)MA Wood 4/39 (14 overs) | 261/4 (63.3 overs)MA Wood 66 (114)L Wood 1/34 (13 overs) | |||
| Durham won the toss and elected to field , Points: Durham 19, Nottinghamshire 4 |
| 10–12 May | Middlesex | v | (H) Sussex | Middlesex won by 79 runs |
| Scorecard | 269 (77.5 overs)AC Voges 38 (49)OE Robinson 4/46 (20.5 overs) | 192 (49.1 overs)BC Brown 46 (54)JAR Harris 3/79 (16 overs) | County Ground, HoveUmpires: Steve Garratt and Jeremy Lloyds | |
| 209 (55.4 overs)JA Simpson 34 (63)SJ Magoffin 4/49 (20.4 overs) | 207 (52.5 overs)MH Yardy 52 (124)NJ Dexter 4/41 (12 overs) | |||
| Sussex won the toss and elected to field , Points: Middlesex 21, Sussex 3 |
| 10–13 May | (H) Yorkshire | v | Hampshire | Yorkshire won by 305 runs |
| Scorecard | 370 (112.3 overs)JM Bairstow 102 (106)JA Tomlinson 4/86 (34 overs) | 227 (80 overs)MA Carberry 97 (208)JA Brooks 4/57 (18 overs) | Headingley, LeedsUmpires: Martin Bodenham and Richard Kettleborough | |
| 305/4d (69 overs)CA Pujara 133* (182)FH Edwards 2/96 (17 overs) | 143 (74.3 overs)WR Smith 64* (207)AU Rashid 4/48 (26 overs) | |||
| Yorkshire won the toss and elected to bat , First-class debut: Lewis McManus (Hampshire) , Points: Yorkshire 23, Hampshire 4 |
| 17–20 May | (H) Hampshire | v | Middlesex | Match drawn |
| Scorecard | 413 (130.2 overs)WR Smith 93 (191)NJ Dexter 5/64 (27.2 overs) | 362 (118.2 overs)NRD Compton 117 (237)FH Edwards 4/100 (22 overs) | The Rose Bowl, SouthamptonUmpires: Rob Bailey and Ian Gould | |
| 185/5d (79 overs)MA Carberry 57 (130)SD Robson 1/8 (3 overs) | ||||
| Middlesex won the toss and elected to field , First-class debut: Brad Wheal (Hampshire) , Points: Hampshire 11, Middlesex 10 |
Team relegated from Division One
| Team | Primary home ground | Other grounds | Coach | Captain | Overseas player(s) |
| Derbyshire | County Ground, Derby | Queen's Park, Chesterfield | Graeme Welch | Wayne Madsen | Martin Guptill (Apr) Hashim Amla (May) Tillakaratne Dilshan (May–Sep) |
| Essex | County Ground, Chelmsford | Castle Park Cricket Ground, Colchester | Paul Grayson | James Foster | Jesse Ryder |
| Glamorgan | SWALEC Stadium, Cardiff | Penrhyn Avenue, Rhos-on-SeaSt Helen's, Swansea | Toby Radford | Jacques Rudolph | Jacques Rudolph |
| Gloucestershire | County Ground, Bristol | College Ground, Cheltenham | Richard Dawson | Geraint Jones | Peter Handscomb (Apr–May) Michael Klinger (May–Sep) |
| Kent | St Lawrence Ground, Canterbury | Kent County Cricket Ground, BeckenhamNevill Ground, Tunbridge Wells | Jimmy Adams | Rob Key | — |
| Lancashire | Old Trafford, Manchester | Trafalgar Road Ground, Southport | Ashley Giles | Glen Chapple | Peter Siddle (Apr–May) James Faulkner (May–Jun) |
| Leicestershire | Grace Road, Leicester | — | Andrew McDonald | Mark Cosgrove | Clint McKay |
| Northamptonshire | County Ground, Northampton | — | David Ripley | Alex Wakely | Rory Kleinveldt |
| Surrey | The Oval, London | Woodbridge Road, Guildford | Graham Ford | Gareth Batty | Kumar Sangakkara |
| Derbyshire | Essex | Glamorgan | Gloucestershire | Kent | Lancashire | Leicestershire | Northamptonshire | Surrey |
| Derbyshire | Essexinns & 188 runs | Match drawn | Match drawn | Match drawn | Lancashire250 runs | Match drawn | Match drawn | Surrey222 runs |
| Essex | Essexinns & 31 runs | Essex248 runs | Gloucestershire9 wickets | Essex5 wickets | Match drawn | Leicestershire6 wickets | Match drawn | Surrey3 wickets |
| Glamorgan | Match drawn | Glamorgan89 runs | Gloucestershire7 wickets | Kent316 runs | Lancashireinns & 157 runs | Glamorgan137 runs | Glamorgan10 wickets | Match drawn |
| Gloucestershire | Derbyshire7 wickets | Essex5 wickets | Match drawn | Kent8 wickets | Lancashire91 runs | Gloucestershire155 runs | Gloucestershire9 wickets | Match drawn |
| Kent | Derbyshire8 wickets | Kentinns & 207 runs | Match drawn | Match drawn | Match drawn | Match drawn | Northamptonshireinns & 23 runs | Surrey3 wickets |
| Lancashire | Lancashireinns & 15 runs | Match drawn | Match drawn | Gloucestershire91 runs | Lancashire9 wickets | Lancashireinns & 157 runs | Match drawn | Match drawn |
| Leicestershire | Leicestershire3 wickets | Essex5 wickets | Match drawn | Match drawn | Kent8 wickets | Lancashire244 runs | Northamptonshire92 runs | Surrey178 runs |
| Northamptonshire | Derbyshire7 wickets | Match drawn | Match drawn | Match drawn | Northamptonshire8 wickets | Match drawn | Match drawn | Match drawn |
| Surrey | Surreyinns & 98 runs | Match drawn | Glamorgan7 wickets | Surreyinns & 180 runs | Surrey6 wickets | Match drawn | Surrey7 wickets | Match drawn |
| Home team won | Visiting team won | Match drawn |
Teams receive 16 points for a win, 8 for a tie and 5 for a draw. Bonus points (a maximum of 5 batting points and 3 bowling points) may be scored during the first 110 overs of each team's first innings.
The first fixtures began on 12 April 2015. The final set of fixtures commenced on 22 September 2015.
Source: Wikipedia